GREYLISTING ON CLUSTERED SYSTEM

[KOSTAS TSIVERIOTIS]

Hello Everybody

I am considering deploying a cluster proxmox email system with 2-4 nodes.
I was wondring how greylisting works on a cluster, with round robin mx records.
Are the the cluster nodes aware that a push-back / tryagain later has already happened on a node of the cluster, in order to accept the mail message next time, if it arrives on another node?

Thanks.

 

[dietmar]

Are the the cluster nodes aware that a push-back / tryagain later has already happened on a node of the cluster, in order to accept the mail message next time, if it arrives on another node?

Yes, the greylisting database is synced between nodes.

 

[KOSTAS TSIVERIOTIS]

Thank you,
so if there is a cluster of 4 nodes,
and the mx records contain all these nodes with same preference,

an incoming mail will be pushed back by (example: node 3) and accepted at once (example) by node 1?

 

[dietmar]

yes

 

[KOSTAS TSIVERIOTIS]

Thank you. Very convenient.